high=eval(input("请输入身高，m为单位"))
weight=eval(input("请输入体重，kg为单位"))
BMI=weight/(high**2)
print("bmi数值为{:.2f}".format(BMI))
if BMI<18.5:
    print("过轻")
elif 18.5<=BMI<25:
    print("正常")
elif 25<=BMI<32:
    print("肥胖")
elif BMI>32:
    print("严重肥胖")